You think Witten rests on his laurels?
I'll give you Crawford, but that list of guys for the most part are not the ones I'd point to as the reason for our up and down seasons.
At the end of the day, these collapses that have happened following promising seasons (2008 following 2007, 2010 following 2009, and 2015 following 2014) have primarily been the result of injuries to Romo. He was knocked out for the season about 5-6 games into the 2010 season and we all know what happened in 2015. I also think a big part of 2008, as well as 2010, was Wade Phillips. Garrett isn't a great coach by any measure but I do think he holds the players much more accountable than Phillips ever did.
But aside from that it's a pretty ridiculous list.
Dez was not on the team in 2008 and was a rookie in 2010, you can't really blame him for anything there. Scandrick was injured in 2015, and Lee was a Pro Bowler that season after not playing in 2014.
Crawford seems justified, Williams maybe as well although I feel his role is small enough to where you can't really blame him for much.
If Prescott and the overall roster are relatively healthy and we go 4-12 or 5-11 then Garrett should be fired, although I'd truly be shocked if that were to happen.